Harrow-tooth.



E. T. commas.

HARRow TOOTH. APPLIUATION FILED JULY 21, l914.

1 116 991 Ptentd Nov. 10, 1914.

WITNESSES: INVENTOR:

THE *ORRIS PE'IRS w. WASHING,"- -D- C.

EDWARDYT. GOLLINGS, 0F rnonnfxflinizonn.

HARROW-TOQTI-I. v g

Specification of Letters Patent. -Pa,{;eflfed NOV, Application filed July 21, 1914. SerialNo. 852,301. Y

TQCZZZ wlwm it may concern Be it known that I, EDWARD T. CoLLINcs,

citizen of the United States, residing at Phoenix, in the county of Maricopa and State of Arizona, have invented certain new" and useful Improvements in Harrow-Teeth; and I .do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appertainsto make and use the same.

This invention relates to harrow teeth, and more especially to those which are resilient so that they may spring when in use; and the object of the same is to provide an improved reinforcement for such a harrow tooth. g

The present invention is designed primarily as an improvement on the construction disclosed by Letters Patent issued to me No. 1077806, on November 4:, 1913. While. the harrow tooth in that case gives excellent service under most conditions and in most soils, I find that extremely hard ground causes the tooth to either break or straighten out, and it is the purpose of the present invention to provide a reinforcement which will strengthen the harrow tooth at the point where it needs strengthening whenused on extremely hard ground. This reinforcement is in the shape of a leaf, somewhat like those employed in vehicle springs, but it is of'especial form adapting it to be secured at one end to the body of the harrow tooth and to follow the curvature thereof. Details will be found in the following specification, and are illustrated in the drawings wherein- Figure 1 is a side elevation of my improved harrow' tooth with its reinforcement applied, Fig. 2 is a bottom planview of Fig. 1. Fig. 3 is a cross section on the line 33 of Fig. 2, and Fig. 4 is a side elevation of the reinforcement alone.

In the drawing hereto attached I have used reference letters to refer to the harrow tooth forming the subject matter of my prior patent, and reference numerals to refer to the reinforcement which forms the subject matter of the present application. With that understanding, the letter B designates the body of the harrow tooth which is secured to the tooth bar at the point S and which has its lower end or point P extending forward and standing beneath the point of attachment to the tooth bar, said lower side asv atC in Fig. 2 and rounded atits end or point being channeled on the front end or tip T as explained inmy former patent, wherein the channeling I of the point andthe rounding of the tip produce effects :which arefextremely advantageous.

Coming now to the details of thepresent invention, the reinforcement forming the subject matter thereof is a strip of steel of substantially the samewidth as the body of the harrow-tooth,'and its shape inside elevatioi'r is best seen in Fig. 4c. Itsbody 1 followsCthe curvature of the body of the tooth and stands behind and in close contact with -said-body,its upper end isbent at right anglesinto a shoulder 2 adapted to rest against oneedge of aclip plate?) which overlies this end ofthe reinforceas seenin'] Fig. 1, and all parts are clamped together by means of a U-shaped bolt or clevis 4, thus rendering them detachable and adjustable. Y

The lower end of the reinforce is channeled as best seen at 5 in Fig. 2, its extremity or tip is roundedor contracted as best seen at tion runs out at about 7 in Fig. 1 wherethe channeled portion of the tooth T runs out.

From the above description it will be seen that the reinforce is applied to the body B of the tooth midwaybetween its upper end which is attached to the support and the lower end orpointP, andtherefore the re inforce does not interfere with the attach-, ment or spring of the upper end of the tooth 6 in the same view, and the charineledpor nor w'iththe action of the, lower end there'- 1 of on the ground. As first above stated, the purpose of the reinforce is to strengthen the tooth where the latter ordinarily breaks if" the ground is extra hard, but the use of the clevis 4 and plate 3 permits of the adjustment of the reinforce or its removal if necessary. By channeling the lower end of the reinforce as at 5 and extending it into the channel G of the tooth, the latter is permitted to have its ordinary movements-and .the reinforce slides in the'channel thereof, 1

and moreover the inter-engagementof the channeled parts of the two members prevents the lower end of the reinforce from 105 slipping laterally oft thetooth, while the upper end is of course held in place by the connection described. I t g I do not wish to be limited tothe material, proportion, or size of parts, and changes in or additions to the detailsfmav be made at will. 1 3

What is claimed as new is 1. The combination with a spring harrow tooth secured at its upper end to a support and having a channeled point at its lower end; of a spring reinforce standing midway between the ends of the tooth and in rear of and conforming with the curvature of its body, and means for detachably and adjustably securing the upper. end of the reinforce to the body of the tooth.

2. The combination with a spring har- I row tooth secured at its upper end tona support and having a channeled point at its lower end; of a spring reinforcestanding midway between the ends of the tooth and in rear of and conforming with the curvature of its body, the upper end ofthe reinforce being bent at right angles away from the tooth into a shoulder, a clip plate lying against the rear face of the reinforce and at one edge against said shoulder, and a clevis connecting the plate with the tooth and clamping the reinforce between them.

3. The combination with a harrow tooth secured atits upper end to a supportand having its lower end channeled on its under side, its body between said ends being bent;

of a spring reinforce conforming with the curvature of said bent body and lying against the rear side of the same, its lower end being channeled and extending for a distance along the channel at the lower end of the tooth, and means for securing its, up.-

per end to said body.

4. The combination with a harrow tooth secured at its upper end to a support and having its lower end channeled on its under side, its body between said ends being bent; of a spring reinforce conforming with the curvature of said bent body and lying against the rear side of the same, its lower end being channeled and extending for a distance along the channel at the lower end of the tooth; a clip plate lying against the rear face of the reinforce at its upper end, and a clevis whose bend engages the reinforce and tooth and whose extremities are detachably connected with said plate.

. In testimony whereof I aflix my signature in presence of two witnesses.

EDWARD T. COLLINGS. Witnesses: i

LYMAN W. Pn'rnns, MAURICE, COOK.

Copies of this patent may be obtained for five cents each, by addressing th commissioner of t t i v 'Washington, D. (3. 

